string indicating the column in
colData to color samples.
Value
ggplot object showing nucleotide changes
at a given position.
Details
It shows the nucleotides changes at the given position for each
sample in each group.
The color indicates the sample group. The size of the point is proportional
to the number of total counts of isomiRs with changes.
The position at y is the number of different sequences
supporting the change.